Antimony Antimony is a chemical element with the symbol Sb (from la, stibium) and atomic number 51. A lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite (Sb2S3). Antimony compounds have been known since ancient t ...

(₅₁Sb) occurs in two stable

isotope Isotopes are two or more types of atoms that have the same atomic number (number of protons in their nuclei) and position in the periodic table (and hence belong to the same chemical element), and that differ in nucleon numbers (mass numb ...

s, ¹²¹Sb and ¹²³Sb. There are 35 artificial

radioactive isotopes A radionuclide (radioactive nuclide, radioisotope or radioactive isotope) is a nuclide that has excess nuclear energy, making it unstable. This excess energy can be used in one of three ways: emitted from the nucleus as gamma radiation; transferr ...

, the longest-lived of which are ¹²⁵Sb, with a

half-life Half-life (symbol ) is the time required for a quantity (of substance) to reduce to half of its initial value. The term is commonly used in nuclear physics to describe how quickly unstable atoms undergo radioactive decay or how long stable at ...

of 2.75856 years; ¹²⁴Sb, with a half-life of 60.2 days; and ¹²⁶Sb, with a half-life of 12.35 days. All other isotopes have half-lives less than 4 days, most less than an hour. There are also many

isomers In chemistry, isomers are molecules or polyatomic ions with identical molecular formulae – that is, same number of atoms of each element – but distinct arrangements of atoms in space. Isomerism is existence or possibility of isomers. ...

, the longest-lived of which is ^120m1Sb with a half-life of 5.76 days.

List of isotopes

, - , ¹⁰³Sb , style="text-align:right" , 51 , style="text-align:right" , 52 , 102.93969(32)# , 100# ms 1.5 µs, β⁺ , ¹⁰³Sn , 5/2+# , , , - , rowspan=4, ¹⁰⁴Sb , rowspan=4 style="text-align:right" , 51 , rowspan=4 style="text-align:right" , 53 , rowspan=4, 103.93647(39)# , rowspan=4, 0.47(13) s
.44(+15−11) s, β⁺ (86%) , ¹⁰⁴Sn , rowspan=4, , rowspan=4, , rowspan=4, , - , p (7%) , ¹⁰³Sn , - , β⁺, p (7%) , ¹⁰³In , - , α (<1%) , ¹⁰⁰In , - , rowspan=3, ¹⁰⁵Sb , rowspan=3 style="text-align:right" , 51 , rowspan=3 style="text-align:right" , 54 , rowspan=3, 104.93149(11) , rowspan=3, 1.12(16) s , β⁺ (99%) , ¹⁰⁵Sn , rowspan=3, (5/2+) , rowspan=3, , rowspan=3, , - , p (1%) , ¹⁰⁴Sn , - , β⁺, p (<1%) , ¹⁰⁴In , - , ¹⁰⁶Sb , style="text-align:right" , 51 , style="text-align:right" , 55 , 105.92879(34)# , 0.6(2) s , β⁺ , ¹⁰⁶Sn , (4+) , , , - , style="text-indent:1em" , ^106mSb , colspan="3" style="text-indent:2em" , 1000(500)# keV , 220(20) ns , , , , , , - , ¹⁰⁷Sb , style="text-align:right" , 51 , style="text-align:right" , 56 , 106.92415(32)# , 4.0(2) s , β⁺ , ¹⁰⁷Sn , 5/2+# , , , - , rowspan=2, ¹⁰⁸Sb , rowspan=2 style="text-align:right" , 51 , rowspan=2 style="text-align:right" , 57 , rowspan=2, 107.92216(22)# , rowspan=2, 7.4(3) s , β⁺ , ¹⁰⁸Sn , rowspan=2, (4+) , rowspan=2, , rowspan=2, , - , β⁺, p (rare) , ¹⁰⁷In , - , ¹⁰⁹Sb , style="text-align:right" , 51 , style="text-align:right" , 58 , 108.918132(20) , 17.3(5) s , β⁺ , ¹⁰⁹Sn , 5/2+# , , , - , ¹¹⁰Sb , style="text-align:right" , 51 , style="text-align:right" , 59 , 109.91675(22)# , 23.0(4) s , β⁺ , ¹¹⁰Sn , (4+) , , , - , ¹¹¹Sb , style="text-align:right" , 51 , style="text-align:right" , 60 , 110.91316(3) , 75(1) s , β⁺ , ¹¹¹Sn , (5/2+) , , , - , ¹¹²Sb , style="text-align:right" , 51 , style="text-align:right" , 61 , 111.912398(19) , 51.4(10) s , β⁺ , ¹¹²Sn , 3+ , , , - , ¹¹³Sb , style="text-align:right" , 51 , style="text-align:right" , 62 , 112.909372(19) , 6.67(7) min , β⁺ , ¹¹³Sn , 5/2+ , , , - , ¹¹⁴Sb , style="text-align:right" , 51 , style="text-align:right" , 63 , 113.90927(3) , 3.49(3) min , β⁺ , ¹¹⁴Sn , (3+) , , , - , style="text-indent:1em" , ^114mSb , colspan="3" style="text-indent:2em" , 495.5(7) keV , 219(12) µs , , , (8−) , , , - , ¹¹⁵Sb , style="text-align:right" , 51 , style="text-align:right" , 64 , 114.906598(17) , 32.1(3) min , β⁺ , ¹¹⁵Sn , 5/2+ , , , - , ¹¹⁶Sb , style="text-align:right" , 51 , style="text-align:right" , 65 , 115.906794(6) , 15.8(8) min , β⁺ , ¹¹⁶Sn , 3+ , , , - , style="text-indent:1em" , ^116m1Sb , colspan="3" style="text-indent:2em" , 93.99(5) keV , 194(4) ns , , , 1+ , , , - , style="text-indent:1em" , ^116m2Sb , colspan="3" style="text-indent:2em" , 380(40) keV , 60.3(6) min , β⁺ , ¹¹⁶Sn , 8− , , , - , ¹¹⁷Sb , style="text-align:right" , 51 , style="text-align:right" , 66 , 116.904836(10) , 2.80(1) h , β⁺ , ¹¹⁷Sn , 5/2+ , , , - , ¹¹⁸Sb , style="text-align:right" , 51 , style="text-align:right" , 67 , 117.905529(4) , 3.6(1) min , β⁺ , ¹¹⁸Sn , 1+ , , , - , style="text-indent:1em" , ^118m1Sb , colspan="3" style="text-indent:2em" , 50.814(21) keV , 20.6(6) µs , , , (3)+ , , , - , style="text-indent:1em" , ^118m2Sb , colspan="3" style="text-indent:2em" , 250(6) keV , 5.00(2) h , β⁺ , ¹¹⁸Sn , 8− , , , - , ¹¹⁹Sb , style="text-align:right" , 51 , style="text-align:right" , 68 , 118.903942(9) , 38.19(22) h , EC , ¹¹⁹Sn , 5/2+ , , , - , style="text-indent:1em" , ^119m1Sb , colspan="3" style="text-indent:2em" , 2553.6(3) keV , 130(3) ns , , , (19/2−) , , , - , style="text-indent:1em" , ^119m2Sb , colspan="3" style="text-indent:2em" , 2852(7) keV , 850(90) ms , IT , ¹¹⁹Sb , 27/2+# , , , - , ¹²⁰Sb , style="text-align:right" , 51 , style="text-align:right" , 69 , 119.905072(8) , 15.89(4) min , β⁺ , ¹²⁰Sn , 1+ , , , - , style="text-indent:1em" , ^120m1Sb , colspan="3" style="text-indent:2em" , 0(100)# keV , 5.76(2) d , β⁺ , ¹²⁰Sn , 8− , , , - , style="text-indent:1em" , ^120m2Sb , colspan="3" style="text-indent:2em" , 78.16(5) keV , 246(2) ns , , , (3+) , , , - , style="text-indent:1em" , ^120m3Sb , colspan="3" style="text-indent:2em" , 2328.3(6) keV , 400(8) ns , , , (6) , , , - , ¹²¹Sb Fission product , style="text-align:right" , 51 , style="text-align:right" , 70 , 120.9038157(24) , colspan=3 align=center, StableTheoretically capable of spontaneous fission , 5/2+ , 0.5721(5) , , - , rowspan=2, ¹²²Sb , rowspan=2 style="text-align:right" , 51 , rowspan=2 style="text-align:right" , 71 , rowspan=2, 121.9051737(24) , rowspan=2, 2.7238(2) d , β⁻ (97.59%) , ¹²²Te , rowspan=2, 2− , rowspan=2, , rowspan=2, , - , β⁺ (2.41%) , ¹²²Sn , - , style="text-indent:1em" , ^122m1Sb , colspan="3" style="text-indent:2em" , 61.4131(5) keV , 1.86(8) µs , , , 3+ , , , - , style="text-indent:1em" , ^122m2Sb , colspan="3" style="text-indent:2em" , 137.4726(8) keV , 0.53(3) ms , , , (5)+ , , , - , style="text-indent:1em" , ^122m3Sb , colspan="3" style="text-indent:2em" , 163.5591(17) keV , 4.191(3) min , IT , ¹²²Sb , (8)− , , , - , ¹²³Sb , style="text-align:right" , 51 , style="text-align:right" , 72 , 122.9042140(22) , colspan=3 align=center, Stable , 7/2+ , 0.4279(5) , , - , ¹²⁴Sb , style="text-align:right" , 51 , style="text-align:right" , 73 , 123.9059357(22) , 60.20(3) d , β⁻ , ¹²⁴Te , 3− , , , - , rowspan=2 style="text-indent:1em" , ^124m1Sb , rowspan=2 colspan="3" style="text-indent:2em" , 10.8627(8) keV , rowspan=2, 93(5) s , IT (75%) , ¹²⁴Sb , rowspan=2, 5+ , rowspan=2, , rowspan=2, , - , β⁻ (25%) , ¹²⁴Te , - , style="text-indent:1em" , ^124m2Sb , colspan="3" style="text-indent:2em" , 36.8440(14) keV , 20.2(2) min , , , (8)− , , , - , style="text-indent:1em" , ^124m3Sb , colspan="3" style="text-indent:2em" , 40.8038(7) keV , 3.2(3) µs , , , (3+, 4+) , , , - , ¹²⁵Sb , style="text-align:right" , 51 , style="text-align:right" , 74 , 124.9052538(28) , 2.75856(25) y , β⁻ , ^125mTe , 7/2+ , , , - , ¹²⁶Sb , style="text-align:right" , 51 , style="text-align:right" , 75 , 125.90725(3) , 12.35(6) d , β⁻ , ¹²⁶Te , (8−) , , , - , rowspan=2 style="text-indent:1em" , ^126m1Sb , rowspan=2 colspan="3" style="text-indent:2em" , 17.7(3) keV , rowspan=2, 19.15(8) min , β⁻ (86%) , ¹²⁶Te , rowspan=2, (5+) , rowspan=2, , rowspan=2, , - , IT (14%) , ¹²⁶Sb , - , style="text-indent:1em" , ^126m2Sb , colspan="3" style="text-indent:2em" , 40.4(3) keV , ~11 s , IT , ^126m1Sb , (3−) , , , - , style="text-indent:1em" , ^126m3Sb , colspan="3" style="text-indent:2em" , 104.6(3) keV , 553(5) ns , , , (3+) , , , - , ¹²⁷Sb , style="text-align:right" , 51 , style="text-align:right" , 76 , 126.906924(6) , 3.85(5) d , β⁻ , ^127mTe , 7/2+ , , , - , ¹²⁸Sb , style="text-align:right" , 51 , style="text-align:right" , 77 , 127.909169(27) , 9.01(4) h , β⁻ , ''¹²⁸Te'' , 8− , , , - , rowspan=2 style="text-indent:1em" , ^128mSb , rowspan=2 colspan="3" style="text-indent:2em" , 10(7) keV , rowspan=2, 10.4(2) min , β⁻ (96.4%) , ''¹²⁸Te'' , rowspan=2, 5+ , rowspan=2, , rowspan=2, , - , IT (3.6%) , ¹²⁸Sb , - , ¹²⁹Sb , style="text-align:right" , 51 , style="text-align:right" , 78 , 128.909148(23) , 4.40(1) h , β⁻ , ^129mTe , 7/2+ , , , - , rowspan=2 style="text-indent:1em" , ^129m1Sb , rowspan=2 colspan="3" style="text-indent:2em" , 1851.05(10) keV , rowspan=2, 17.7(1) min , β⁻ (85%) , ¹²⁹Te , rowspan=2, (19/2−) , rowspan=2, , rowspan=2, , - , IT (15%) , ¹²⁹Sb , - , style="text-indent:1em" , ^129m2Sb , colspan="3" style="text-indent:2em" , 1860.90(10) keV , >2 µs , , , (15/2−) , , , - , style="text-indent:1em" , ^129m3Sb , colspan="3" style="text-indent:2em" , 2138.9(5) keV , 1.1(1) µs , , , (23/2+) , , , - , ¹³⁰Sb , style="text-align:right" , 51 , style="text-align:right" , 79 , 129.911656(18) , 39.5(8) min , β⁻ , ''¹³⁰Te'' , (8−)# , , , - , style="text-indent:1em" , ^130mSb , colspan="3" style="text-indent:2em" , 4.80(20) keV , 6.3(2) min , β⁻ , ''¹³⁰Te'' , (4, 5)+ , , , - , ¹³¹Sb , style="text-align:right" , 51 , style="text-align:right" , 80 , 130.911982(22) , 23.03(4) min , β⁻ , ^131mTe , (7/2+) , , , - , ¹³²Sb , style="text-align:right" , 51 , style="text-align:right" , 81 , 131.914467(15) , 2.79(5) min , β⁻ , ¹³²Te , (4+) , , , - , style="text-indent:1em" , ^132m1Sb , colspan="3" style="text-indent:2em" , 200(30) keV , 4.15(5) min , β⁻ , ¹³²Te , (8−) , , , - , style="text-indent:1em" , ^132m2Sb , colspan="3" style="text-indent:2em" , 254.5(3) keV , 102(4) ns , , , (6−) , , , - , ¹³³Sb , style="text-align:right" , 51 , style="text-align:right" , 82 , 132.915252(27) , 2.5(1) min , β⁻ , ^133mTe , (7/2+) , , , - , ¹³⁴Sb , style="text-align:right" , 51 , style="text-align:right" , 83 , 133.92038(5) , 0.78(6) s , β⁻ , ¹³⁴Te , (0-) , , , - , rowspan=2 style="text-indent:1em" , ^134mSb , rowspan=2 colspan="3" style="text-indent:2em" , 80(110) keV , rowspan=2, 10.07(5) s , β⁻ (99.9%) , ¹³⁴Te , rowspan=2, (7−) , rowspan=2, , rowspan=2, , - , β⁻, n (.091%) , ¹³³Te , - , rowspan=2, ¹³⁵Sb , rowspan=2 style="text-align:right" , 51 , rowspan=2 style="text-align:right" , 84 , rowspan=2, 134.92517(11) , rowspan=2, 1.68(2) s , β⁻ (82.4%) , ¹³⁵Te , rowspan=2, (7/2+) , rowspan=2, , rowspan=2, , - , β⁻, n (17.6%) , ¹³⁴Te , - , rowspan=2, ¹³⁶Sb , rowspan=2 style="text-align:right" , 51 , rowspan=2 style="text-align:right" , 85 , rowspan=2, 135.93035(32)# , rowspan=2, 0.923(14) s , β⁻ (83%) , ¹³⁶Te , rowspan=2, 1−# , rowspan=2, , rowspan=2, , - , β⁻, n (17%) , ¹³⁵Te , - , style="text-indent:1em" , ^136mSb , colspan="3" style="text-indent:2em" , 173(3) keV , 570(50) ns , , , 6−# , , , - , rowspan=2, ¹³⁷Sb , rowspan=2 style="text-align:right" , 51 , rowspan=2 style="text-align:right" , 86 , rowspan=2, 136.93531(43)# , rowspan=2, 450(50) ms , β⁻ , ¹³⁷Te , rowspan=2, 7/2+# , rowspan=2, , rowspan=2, , - , β⁻, n , ¹³⁶Te , - , rowspan=2, ¹³⁸Sb , rowspan=2 style="text-align:right" , 51 , rowspan=2 style="text-align:right" , 87 , rowspan=2, 137.94079(32)# , rowspan=2, 500# ms 300 ns, β⁻ , ¹³⁸Te , rowspan=2, 2−# , rowspan=2, , rowspan=2, , - , β⁻, n , ¹³⁷Te , - , ¹³⁹Sb , style="text-align:right" , 51 , style="text-align:right" , 88 , 138.94598(54)# , 300# ms 300 ns, β⁻ , ¹³⁹Te , 7/2+# , ,

References

* Isotope masses from: ** * Isotopic compositions and standard atomic masses from: ** ** * Half-life, spin, and isomer data selected from the following sources. ** ** ** {{Authority control Antimony

List of isotopes

See also

References